Canada



P. J. SAUSEN.

LIFTING JACK.

APPLICATION FILED JUNE29| \918.

Patented July 15, 1919.

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LIFTING JACK.

APPLICATION FILED JUNEZQ, I918.

Patented July 15, 1919.

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PETER JACOB. SAUSEN, 0]? HEAD 0]? JARVIS? INLET, BRITISH COLUMBIA, CANADA.

LiFTIN'G-JACK.

Application filed. June 29, 1918.

To all whom it may concern:

Be it known that I, PETER JAooB SAUSEN, a subject of Great Britain, residing at Head of Jarvis Inlet, in the Province of'British Columbia, Canada, have invented new and useful Improvements in Lifting-Jacks, of which the following is a specification. I

This invention relates to new anduseful improvements in lifting jacks and the principal object of the invention is to devise a jack the lifting bar of which may be raised or lowered by a slight movement of the lifting handle. I

Another object of the invention is to provide asecond pair of dogs for holding the lifting bar in position when the first pair of dogs are out of engagement with the sald bar.

Another object of the invention is to provide a device of this character which is simple and durable in construction, reliable and eflicient in operation and one which can be manufactured and placed upon the market at a minimum cost.

The invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claims.

In describing my invention in detail, ref erence will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure 1 is an elevation of the jack.

Fig. 2 is a longitudinal section.

Fig. 3 is a front view.

Fig. 4 is a section on line 4l4: of Fig. 2.

Fig. 5 is a section on line 55 of Fig, 2.

'As shown in these views the jack is composed of a base part 1 to which is secured the upright 2 which supports the casing 3. The said casing is preferably composed of metal, the sides of which are formed as shown. The top of the casing is closed by a cap 4 having an opening therein through which the upper end of the lifting bar 5 passes. This bar on its front face is provided with two rows of teeth, indicated at 6, the teeth of one row alternating with those of the other row. The bottom of the lifting bar is provided with a right angular projection 7 which is adapted to engage with Specification of Letters Patent.

Patented July 15, 1919.

Serial No. 242,602.

the part to be lifted. The top of the lifting bar miovably carries a prong shaped mem her 8*, the prongs of which extend in different directions as shown. 8 is the lifting handle having its head pivoted within the caslng and said head'having a'hooked end 8. 9 represents a pair of lifting dogs arranged side by side at the top of the casing and adapted to engage with the two rows of teeth on the lifting bar. The lower ends of said dogs are rounded so as to be engaged by the hooked end 8 of the lifting handle.

, 10 indicates a pair oflevers'pivoted in the casing above the lifting handle and having their upper ends connected with the upper ends of the dogs by means of the links 11. In this manner the dogs are supported in proper position and may be moved out of engagement with the teeth by means of said levers. A spring 12 carried by the casing normally holds the dogs in engagement with the teeth. 13 indicates a second pair of dogs slidably mounted onthe top of the supporting post 2 and held in position by means of the pins 14 located above the said dogs. The outer ends of these dogs are connected vwith a spring handle 15, connected with the post 2 by means of the clip 16 and a spring 17 normally holds the dogs in engagement with the teeth on the lifting bar.

It will be seen that when the lifting bar is to be raised the handle 8 is pressed downwardly so as to lift the dogs 9 and as these dogs are in engagement with the teeth 6 the said bar will be raised. In this operation the dogs 13 will simply slide back and thus permit the bar to raise. In this operation the jack works as an ordinary jack though it will be seen that due to the arrangement of teeth and dogs the lifting bar will be raised with but a slight movement of the handle, thus making the device capable of operation in close quarters, as it is necessary to move the handle only a distance equal to one half the space between the teeth. When the jack is to be lowered under a load the handle is raised slightly to take the weight of the load off the dogs 13. These dogs are then pulled outwardly by means of the spring handle. The handle is then raised and the lower dogs released. Then the levers 10 are moved to release the upper dogs and the handle moved downwardly to raise the upper dogs to engage other teeth. The levers are then released and the lower dogs pulled out and so on until the load is lowered. If there is no load on the jack the lower dogs may be pulled outwardly and the upper dogs released'from the teeth by means of the levers so that the lifting bar Will drop toits lowest position.

7 It is thought from the foregoing description that the advantages and novel features of my invention will be readily apparent.

I desire it to be understood that I may make such changes in the construction and in the com'bination and arrangement of the several parts, provided that such changes fall Within the scope of the appended claims.

What I claim is 1. A lifting jack comprising a lifting bar provided on one face with a double row of teeth alternately arranged, a pair of alinedlifting dogs engaging with said teeth, a lifting handle engaging With said. dogs Copies of this patent may be obtained. for

and means for releasing said dogs from the teeth.

2. A lifting jack comprising a lifting bar.

provided on one face with a double row .of teeth alternately arranged, a pair of alined lifting dogs engaging with said teeth,

' a lifting handle'engaging with said dogs,

levers connected with said dogs for disengaging the same from the teeth, a pair of holding dogs and a spring handle fo-rinoving said dogs out of contact with the teeth.

In testimony whereof I aflix mysignature.

PETER JACOB SAUSEIN.

five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

